<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
    <!-- <script src="promise-ajax/index.js"></script> -->
</head>
<body>
    <script>
        function http(url){
        return new Promise((resolve,reject)=>{
            $.ajax({
                url:`http://192.168.4.18:3000/${url}`,
                type:"get",
                success:res=>{
                    resolve(res)
                },
                error:err=>{
                    reject(err)
                }
            })
        })
    }
    </script>

    <script>
        // console.log(http())
        http("top/playlist/?cat=华语").then(res=>{
            // console.log(res)
           var id = res.playlists[0].id;
           return id;
        }).then(res=>{
            let id = res;
            console.log(res)
            http(`playlist/detail?id=${id}`).then(res=>{
                console.log(res)
                var {name,id} = res.playlist.tracks[0]
                // return id;
                console.log(id)
                
            })
        })
    </script>
</body>
</html>

